3700-65-0Relevant articles and documents
Metal-triflate ionic liquid systems immobilized onto mesoporous MS41 materials as new and efficient catalysts for N-acylation
Coman, Simona M.,Florea, Mihaela,Parvulescu, Vasile I.,David, Victor,Medvedovici, Andrei,De Vos, Dirk,Jacobs, Pierre A.,Poncelet, George,Grange, Paul
, p. 359 - 369 (2007)
Two kinds of MS41-immobilized ionic liquids (ILs) based on dihydroimidazolium and pyridinium cation were prepared using a grafting method. The second immobilization of triflate salts on these materials led to the immobilization of metal-triflate complexes into ILs. The materials thus obtained were characterized by 1H NMR, XRD, N2-sorption measurements, TG-DTA, DRIFT, XPS, TEM, and ICP-AES. The catalysts were tested in acylation of amines and sulfonamides and proved highly active and selective. For both aromatic and aliphatic amines, acylation with carboxylic acids was possible. For sulfonamides, acylation was possible only with anhydrides. Recycling the catalysts was not accompanied by any leaching of ILs or metal triflate.
One-Pot Synthesis of α-Ketoamides from α-Keto Acids and Amines Using Ynamides as Coupling Reagents
Ma, Jianting,Cui, Xue,Xu, Junyu,Tan, Yinfeng,Wang, Yan,Wang, Xuesong,Li, Youbin
supporting information, p. 3661 - 3667 (2022/02/07)
A one-pot strategy for α-keto amide bond formation have been developed by using ynamides as coupling reagents under extremely mild reaction conditions. Diversely structural α-ketoamides were afforded in up to 98% yield for 36 examples. This reaction features advantages such as practical coupling procedure, wide functional group tolerance, and extremely mild conditions and has potential applications in synthetic and medicinal chemistry.
Catalyst-Free [4+2] Cycloaddition of Ynamides with 2-Halomethyl Phenols to Construct 2-Amino-4 H-Chromenes and α-Halo Enamides Simultaneously
Wen, Hao,Yan, Weibo,Chen, Ping,Li, Yu,Tang, Yu
, p. 12870 - 12881 (2020/11/02)
We report the development of a facile protocol for the [4+2] cycloaddition of ynamides and 2-halomethyl phenols to afford the corresponding 2-amino-4H-chromenes and α-halo enamides under catalyst-free conditions. The reaction proceeds under mild condition
ZnO and ZnO-nanoparticles: Efficient and reusable heterogeneous catalysts for one-pot synthesis of N-acylsulfonamides and sulfonate esters
Tamaddon, Fatemeh,Sabeti, Mohammad Reza,Jafari, Abbas Ali,Tirgir, Farhang,Keshavarz, Elham
, p. 41 - 45 (2012/01/12)
Commercially available and preparative ZnO nanoparticles are reported as efficient and reusable catalysts for the chemoselective synthesis of N-acylsulfonamides and sulfonate esters. A one-pot sequential sulfonylation and acylation of amines took place to afford the N-acylsulfonamides in excellent yields under solvent-free conditions. The ZnO catalyst can be reused for without significant loss of catalytic activity.
α,α,α-Trichloromethylcarbonyl Compounds as Acylating Reagents of Amides
Atanassova, I.A.,Petrov, J.S.,Ognjanova, V.H.,Mollov, N.M.
, p. 2083 - 2090 (2007/10/02)
Various α,α,α-trichloromethylcarbonyl compounds, namely chloral, trichloroacetone, trichloracetophenone and benzyltrichloromethyl acetate are used in alkaline medium as acylating reagents for primary and secondary amides.
